html {
  max-width: 750px;
  margin: 0 auto;
}
body {
  font-family: "PingFangSC-Regular", "sans-serif", "STHeitiSC-Light", "微软雅黑",
    "Microsoft YaHei";
  font-size: 28px;
  line-height: 1.6;
  color: #212121;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  touch-callout: none;
}
html,
body {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

/***************************/
.page_box {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}
.page-list {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}
.page {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.page.hide {
  display: none;
}

.page.inTop {
  -webkit-animation: ShowTop 0.5s ease-out both;
  animation: ShowTop 0.5s ease-out both;
}
.page.outTop {
  -webkit-animation: HideTop 0.5s ease-out both;
  animation: HideTop 0.5s ease-out both;
}
.page.inDown {
  -webkit-animation: ShowDown 0.5s ease-out both;
  animation: ShowDown 0.5s ease-out both;
}
.page.outDown {
  -webkit-animation: HideDown 0.5s ease-out both;
  animation: HideDown 0.5s ease-out both;
}
@-webkit-keyframes ShowTop {
  0% {
    -webkit-transform: translateY(100%);
  }
  100% {
    -webkit-transform: translateY(0);
  }
}
@keyframes ShowTop {
  0% {
    transform: translateY(100%);
  }
  100% {
    transform: translateY(0);
  }
}
@-webkit-keyframes HideTop {
  0% {
    -webkit-transform: translateY(0);
  }
  100% {
    -webkit-transform: translateY(-100%);
  }
}
@keyframes HideTop {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-100%);
  }
}
@-webkit-keyframes ShowDown {
  0% {
    -webkit-transform: translateY(-100%);
  }
  100% {
    -webkit-transform: translateY(0);
  }
}
@keyframes ShowDown {
  0% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(0);
  }
}
@-webkit-keyframes HideDown {
  0% {
    -webkit-transform: translateY(0);
  }
  100% {
    -webkit-transform: translateY(100%);
  }
}
@keyframes HideDown {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(100%);
  }
}

.arrow {
  width: 60px;
  height: 52px;
  color: #f00;
  font-size: 36px;
  position: absolute;
  left: 50%;
  margin-left: -30px;
  bottom: 0;
  -webkit-animation: fadeIn 0.5s 1s ease-in-out both;
  animation: fadeIn 0.5s 1s ease-in-out both;
}
.arrow.hide {
  display: none;
}
.arrow div:first-child,
.arrow div:last-child {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 60px;
  height: 40px;
  position: absolute;
  left: 0;
  -webkit-transform-origin: center top;
  transform-origin: center top;
}
.arrow div:first-child {
  top: 0;
  -webkit-animation: arrow 0.8s 0.5s ease-in-out infinite alternate;
  animation: arrow 0.8s 0.5s ease-in-out infinite alternate;
}
.arrow div:last-child {
  top: 12px;
  -webkit-animation: arrow 0.8s 0.8s ease-in-out infinite alternate;
  animation: arrow 0.8s 0.8s ease-in-out infinite alternate;
}
@-webkit-keyframes arrow {
  100% {
    -webkit-transform: translateY(-50%);
    opacity: 1;
  }
  0% {
    -webkit-transform: translateY(0);
    opacity: 0;
  }
}
@keyframes arrow {
  100% {
    transform: translateY(-50%);
    opacity: 1;
  }
  0% {
    transform: translateY(0);
    opacity: 0;
  }
}
/***************************/

@-webkit-keyframes fadeInMinToMax {
  0% {
    -webkit-transform: scale(0);
    opacity: 0;
  }
  100% {
    -webkit-transform: scale(1);
    opacity: 1;
  }
}
@keyframes fadeInMinToMax {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}
.page {
  font-size: 40px;
  background: url()
    repeat-y;
  background-size: 100%;
}
.page_title {
  white-space: nowrap;
  width: 80%;
  height: 100px;
  line-height: 100px;
  margin: 0 auto;
  text-align: center;
  font-size: 50px;
  -webkit-animation: fadeInMinToMax 0.8s 0.4s ease-out both;
  animation: fadeInMinToMax 0.8s 0.4s ease-out both;
}
.page .scroll_box {
  width: 80%;
  height: 60vh;
  margin: 0 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  -webkit-animation: fadeInMinToMax 1.5s 0.4s ease-out both;
  animation: fadeInMinToMax 1.5s 0.4s ease-out both;
}
.page .scroll_box > div {
  padding: 50px 0 80px 0;
}
.page_body {
  width: 100%;
}
.page_body div:nth-child(1) {
  -webkit-animation: fadeInMinToMax 0.8s 0.4s ease-out both;
  animation: fadeInMinToMax 0.8s 0.4s ease-out both;
}
.page_body div:nth-child(2) {
  -webkit-animation: fadeInMinToMax 0.8s 0.5s ease-out both;
  animation: fadeInMinToMax 0.8s 0.5s ease-out both;
}

/* music */
@-webkit-keyframes reverseRotataZ {
  0% {
    -webkit-transform: rotateZ(0deg);
  }
  100% {
    -webkit-transform: rotateZ(-360deg);
  }
}
@-webkit-keyframes rotataZ {
  0% {
    -webkit-transform: rotateZ(0deg);
  }
  100% {
    -webkit-transform: rotateZ(360deg);
  }
}
#musicControl {
  position: fixed;
  right: 10px;
  top: 20px;
  margin-top: 0;
  display: inline-block;
  z-index: 99999999;
}
#musicControl a {
  display: inline-block;
  width: 100px;
  height: 100px;
  overflow: hidden;
  background: url("../img/play.png") no-repeat;
  background-size: 100%;
}
#musicControl a audio {
  width: 100%;
  height: 56px;
}
#musicControl a.stop {
  background-position: left bottom;
}
#musicControl a.on {
  background-position: 0px 1px;
  -webkit-animation: reverseRotataZ 1.2s linear infinite;
}
#music_play_filter {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 99999998;
}
